A great starter recipe to use if you are new to sourdough baking. The dough cycle of the bread machine can be used to prepare the dough, if you like. Prep time does not include proofing time for starter.
Carl T. Griffith, who gave a sourdough starter to anyone who asked, or who sent him a self-addressed stamped envelope. Celebrating Carl Griffith's 1847 Oregon Trail Sourdough Starter Website has link to be able to get some.